From 40a7cd92197bfa947a1dab80c73a42dd33ac5067 Mon Sep 17 00:00:00 2001 From: Gavin Shan Date: Mon, 27 Feb 2012 20:04:08 +0000 Subject: [PATCH] powerpc/eeh: Replace pci_dn with eeh_dev for EEH aux components The original EEH implementation is heavily depending on struct pci_dn. We have to put EEH related information to pci_dn. Actually, we could split struct pci_dn so that the EEH sensitive information to form an individual struct, then EEH looks more independent. The patch replaces pci_dn with eeh_dev for EEH aux components like event and driver. Also, the eeh_event struct has been adjusted for a little bit since eeh_dev has linked the associated FDT (Flat Device Tree) node and PCI device. It's not necessary for eeh_event struct to trace FDT node and PCI device. We can just simply to trace eeh_dev in eeh_event. The patch also renames function pcid_name() to eeh_pcid_name(), which should be missed in the previous patch where the EEH aux components have been cleaned up. Signed-off-by: Gavin Shan Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/eeh_event.h | 7 +- arch/powerpc/platforms/pseries/eeh.c | 2 +- arch/powerpc/platforms/pseries/eeh_driver.c | 81 ++++++++++----------- arch/powerpc/platforms/pseries/eeh_event.c | 36 ++++----- 4 files changed, 63 insertions(+), 63 deletions(-) diff --git a/arch/powerpc/include/asm/eeh_event.h b/arch/powerpc/include/asm/eeh_event.h index 25ebf6a5aa57..c68b012b7797 100644 --- a/arch/powerpc/include/asm/eeh_event.h +++ b/arch/powerpc/include/asm/eeh_event.h @@ -28,12 +28,11 @@ */ struct eeh_event { struct list_head list; /* to form event queue */ - struct device_node *dn; /* struct device node */ - struct pci_dev *dev; /* affected device */ + struct eeh_dev *edev; /* EEH device */ }; -int eeh_send_failure_event(struct device_node *dn, struct pci_dev *dev); -struct pci_dn *handle_eeh_events(struct eeh_event *); +int eeh_send_failure_event(struct eeh_dev *edev); +struct eeh_dev *handle_eeh_events(struct eeh_event *); #endif /* __KERNEL__ */ #endif /* ASM_POWERPC_EEH_EVENT_H */ diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index aec10f66f5fe..9b1fd0c09295 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -475,7 +475,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) eeh_mark_slot(dn, EEH_MODE_ISOLATED); raw_spin_unlock_irqrestore(&confirm_error_lock, flags); - eeh_send_failure_event(edev->dn, edev->pdev); + eeh_send_failure_event(edev); /* Most EEH events are due to device driver bugs. Having * a stack trace will help the device-driver authors figure diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c index 3f25fab741e2..baf92cd9dfab 100644 --- a/arch/powerpc/platforms/pseries/eeh_driver.c +++ b/arch/powerpc/platforms/pseries/eeh_driver.c @@ -40,7 +40,7 @@ * This routine is used to retrieve the name of PCI device driver * if that's valid. */ -static inline const char *pcid_name(struct pci_dev *pdev) +static inline const char *eeh_pcid_name(struct pci_dev *pdev) { if (pdev && pdev->dev.driver) return pdev->dev.driver->name; @@ -81,7 +81,7 @@ static void print_device_node_tree(struct pci_dn *pdn, int dent) */ static void eeh_disable_irq(struct pci_dev *dev) { - struct device_node *dn = pci_device_to_OF_node(dev); + struct eeh_dev *edev = pci_dev_to_eeh_dev(dev); /* Don't disable MSI and MSI-X interrupts. They are * effectively disabled by the DMA Stopped state @@ -93,7 +93,7 @@ static void eeh_disable_irq(struct pci_dev *dev) if (!irq_has_action(dev->irq)) return; - PCI_DN(dn)->eeh_mode |= EEH_MODE_IRQ_DISABLED; + edev->mode |= EEH_MODE_IRQ_DISABLED; disable_irq_nosync(dev->irq); } @@ -106,10 +106,10 @@ static void eeh_disable_irq(struct pci_dev *dev) */ static void eeh_enable_irq(struct pci_dev *dev) { - struct device_node *dn = pci_device_to_OF_node(dev); + struct eeh_dev *edev = pci_dev_to_eeh_dev(dev); - if ((PCI_DN(dn)->eeh_mode) & EEH_MODE_IRQ_DISABLED) { - PCI_DN(dn)->eeh_mode &= ~EEH_MODE_IRQ_DISABLED; + if ((edev->mode) & EEH_MODE_IRQ_DISABLED) { + edev->mode &= ~EEH_MODE_IRQ_DISABLED; enable_irq(dev->irq); } } @@ -270,20 +270,20 @@ static int eeh_report_failure(struct pci_dev *dev, void *userdata) /** * eeh_reset_device - Perform actual reset of a pci slot - * @pe_dn: PE associated device node + * @edev: PE associated EEH device * @bus: PCI bus corresponding to the isolcated slot * * This routine must be called to do reset on the indicated PE. * During the reset, udev might be invoked because those affected * PCI devices will be removed and then added. */ -static int eeh_reset_device(struct pci_dn *pe_dn, struct pci_bus *bus) +static int eeh_reset_device(struct eeh_dev *edev, struct pci_bus *bus) { struct device_node *dn; int cnt, rc; /* pcibios will clear the counter; save the value */ - cnt = pe_dn->eeh_freeze_count; + cnt = edev->freeze_count; if (bus) pcibios_remove_pci_devices(bus); @@ -292,21 +292,22 @@ static int eeh_reset_device(struct pci_dn *pe_dn, struct pci_bus *bus) * Reconfigure bridges and devices. Don't try to bring the system * up if the reset failed for some reason. */ - rc = eeh_reset_pe(pe_dn); + rc = eeh_reset_pe(edev); if (rc) return rc; /* Walk over all functions on this device. */ - dn = pe_dn->node; - if (!pcibios_find_pci_bus(dn) && PCI_DN(dn->parent)) + dn = eeh_dev_to_of_node(edev); + if (!pcibios_find_pci_bus(dn) && of_node_to_eeh_dev(dn->parent)) dn = dn->parent->child; while (dn) { - struct pci_dn *ppe = PCI_DN(dn); + struct eeh_dev *pedev = of_node_to_eeh_dev(dn); + /* On Power4, always true because eeh_pe_config_addr=0 */ - if (pe_dn->eeh_pe_config_addr == ppe->eeh_pe_config_addr) { + if (edev->pe_config_addr == pedev->pe_config_addr) { eeh_ops->configure_bridge(dn); - eeh_restore_bars(ppe); + eeh_restore_bars(pedev); } dn = dn->sibling; } @@ -321,7 +322,7 @@ static int eeh_reset_device(struct pci_dn *pe_dn, struct pci_bus *bus) ssleep(5); pcibios_add_pci_devices(bus); } - pe_dn->eeh_freeze_count = cnt; + edev->freeze_count = cnt; return 0; } @@ -348,23 +349,22 @@ static int eeh_reset_device(struct pci_dn *pe_dn, struct pci_bus *bus) * drivers (which cause a second set of hotplug events to go out to * userspace). */ -struct pci_dn *handle_eeh_events(struct eeh_event *event) +struct eeh_dev *handle_eeh_events(struct eeh_event *event) { struct device_node *frozen_dn; - struct pci_dn *frozen_pdn; + struct eeh_dev *frozen_edev; struct pci_bus *frozen_bus; int rc = 0; enum pci_ers_result result = PCI_ERS_RESULT_NONE; const char *location, *pci_str, *drv_str, *bus_pci_str, *bus_drv_str; - frozen_dn = eeh_find_device_pe(event->dn); + frozen_dn = eeh_find_device_pe(eeh_dev_to_of_node(event->edev)); if (!frozen_dn) { - - location = of_get_property(event->dn, "ibm,loc-code", NULL); + location = of_get_property(eeh_dev_to_of_node(event->edev), "ibm,loc-code", NULL); location = location ? location : "unknown"; printk(KERN_ERR "EEH: Error: Cannot find partition endpoint " "for location=%s pci addr=%s\n", - location, eeh_pci_name(event->dev)); + location, eeh_pci_name(eeh_dev_to_pci_dev(event->edev))); return NULL; } @@ -389,22 +389,21 @@ struct pci_dn *handle_eeh_events(struct eeh_event *event) return NULL; } - frozen_pdn = PCI_DN(frozen_dn); - frozen_pdn->eeh_freeze_count++; + frozen_edev = of_node_to_eeh_dev(frozen_dn); + frozen_edev->freeze_count++; + pci_str = eeh_pci_name(eeh_dev_to_pci_dev(event->edev)); + drv_str = eeh_pcid_name(eeh_dev_to_pci_dev(event->edev)); - pci_str = eeh_pci_name(event->dev); - drv_str = pcid_name(event->dev); - - if (frozen_pdn->eeh_freeze_count > EEH_MAX_ALLOWED_FREEZES) + if (frozen_edev->freeze_count > EEH_MAX_ALLOWED_FREEZES) goto excess_failures; printk(KERN_WARNING "EEH: This PCI device has failed %d times in the last hour:\n", - frozen_pdn->eeh_freeze_count); + frozen_edev->freeze_count); - if (frozen_pdn->pcidev) { - bus_pci_str = pci_name(frozen_pdn->pcidev); - bus_drv_str = pcid_name(frozen_pdn->pcidev); + if (frozen_edev->pdev) { + bus_pci_str = pci_name(frozen_edev->pdev); + bus_drv_str = eeh_pcid_name(frozen_edev->pdev); printk(KERN_WARNING "EEH: Bus location=%s driver=%s pci addr=%s\n", location, bus_drv_str, bus_pci_str); @@ -425,7 +424,7 @@ struct pci_dn *handle_eeh_events(struct eeh_event *event) /* Get the current PCI slot state. This can take a long time, * sometimes over 3 seconds for certain systems. */ - rc = eeh_ops->wait_state(frozen_pdn->node, MAX_WAIT_FOR_RECOVERY*1000); + rc = eeh_ops->wait_state(eeh_dev_to_of_node(frozen_edev), MAX_WAIT_FOR_RECOVERY*1000); if (rc < 0 || rc == EEH_STATE_NOT_SUPPORT) { printk(KERN_WARNING "EEH: Permanent failure\n"); goto hard_fail; @@ -435,14 +434,14 @@ struct pci_dn *handle_eeh_events(struct eeh_event *event) * don't post the error log until after all dev drivers * have been informed. */ - eeh_slot_error_detail(frozen_pdn, EEH_LOG_TEMP); + eeh_slot_error_detail(frozen_edev, EEH_LOG_TEMP); /* If all device drivers were EEH-unaware, then shut * down all of the device drivers, and hope they * go down willingly, without panicing the system. */ if (result == PCI_ERS_RESULT_NONE) { - rc = eeh_reset_device(frozen_pdn, frozen_bus); + rc = eeh_reset_device(frozen_edev, frozen_bus); if (rc) { printk(KERN_WARNING "EEH: Unable to reset, rc=%d\n", rc); goto hard_fail; @@ -451,7 +450,7 @@ struct pci_dn *handle_eeh_events(struct eeh_event *event) /* If all devices reported they can proceed, then re-enable MMIO */ if (result == PCI_ERS_RESULT_CAN_RECOVER) { - rc = eeh_pci_enable(frozen_pdn, EEH_OPT_THAW_MMIO); + rc = eeh_pci_enable(frozen_edev, EEH_OPT_THAW_MMIO); if (rc < 0) goto hard_fail; @@ -465,7 +464,7 @@ struct pci_dn *handle_eeh_events(struct eeh_event *event) /* If all devices reported they can proceed, then re-enable DMA */ if (result == PCI_ERS_RESULT_CAN_RECOVER) { - rc = eeh_pci_enable(frozen_pdn, EEH_OPT_THAW_DMA); + rc = eeh_pci_enable(frozen_edev, EEH_OPT_THAW_DMA); if (rc < 0) goto hard_fail; @@ -483,7 +482,7 @@ struct pci_dn *handle_eeh_events(struct eeh_event *event) /* If any device called out for a reset, then reset the slot */ if (result == PCI_ERS_RESULT_NEED_RESET) { - rc = eeh_reset_device(frozen_pdn, NULL); + rc = eeh_reset_device(frozen_edev, NULL); if (rc) { printk(KERN_WARNING "EEH: Cannot reset, rc=%d\n", rc); goto hard_fail; @@ -502,7 +501,7 @@ struct pci_dn *handle_eeh_events(struct eeh_event *event) /* Tell all device drivers that they can resume operations */ pci_walk_bus(frozen_bus, eeh_report_resume, NULL); - return frozen_pdn; + return frozen_edev; excess_failures: /* @@ -515,7 +514,7 @@ excess_failures: "has failed %d times in the last hour " "and has been permanently disabled.\n" "Please try reseating this device or replacing it.\n", - location, drv_str, pci_str, frozen_pdn->eeh_freeze_count); + location, drv_str, pci_str, frozen_edev->freeze_count); goto perm_error; hard_fail: @@ -526,7 +525,7 @@ hard_fail: location, drv_str, pci_str); perm_error: - eeh_slot_error_detail(frozen_pdn, EEH_LOG_PERM); + eeh_slot_error_detail(frozen_edev, EEH_LOG_PERM); /* Notify all devices that they're about to go down. */ pci_walk_bus(frozen_bus, eeh_report_failure, NULL); diff --git a/arch/powerpc/platforms/pseries/eeh_event.c b/arch/powerpc/platforms/pseries/eeh_event.c index e98347cb9cc0..4a4752565856 100644 --- a/arch/powerpc/platforms/pseries/eeh_event.c +++ b/arch/powerpc/platforms/pseries/eeh_event.c @@ -56,8 +56,8 @@ DEFINE_MUTEX(eeh_event_mutex); static int eeh_event_handler(void * dummy) { unsigned long flags; - struct eeh_event *event; - struct pci_dn *pdn; + struct eeh_event *event; + struct eeh_dev *edev; daemonize("eehd"); set_current_state(TASK_INTERRUPTIBLE); @@ -77,23 +77,26 @@ static int eeh_event_handler(void * dummy) /* Serialize processing of EEH events */ mutex_lock(&eeh_event_mutex); - eeh_mark_slot(event->dn, EEH_MODE_RECOVERING); + edev = event->edev; + eeh_mark_slot(eeh_dev_to_of_node(edev), EEH_MODE_RECOVERING); printk(KERN_INFO "EEH: Detected PCI bus error on device %s\n", - eeh_pci_name(event->dev)); + eeh_pci_name(edev->pdev)); - pdn = handle_eeh_events(event); + edev = handle_eeh_events(event); + + eeh_clear_slot(eeh_dev_to_of_node(edev), EEH_MODE_RECOVERING); + pci_dev_put(edev->pdev); - eeh_clear_slot(event->dn, EEH_MODE_RECOVERING); - pci_dev_put(event->dev); kfree(event); mutex_unlock(&eeh_event_mutex); /* If there are no new errors after an hour, clear the counter. */ - if (pdn && pdn->eeh_freeze_count>0) { + if (edev && edev->freeze_count>0) { msleep_interruptible(3600*1000); - if (pdn->eeh_freeze_count>0) - pdn->eeh_freeze_count--; + if (edev->freeze_count>0) + edev->freeze_count--; + } return 0; @@ -114,17 +117,17 @@ static void eeh_thread_launcher(struct work_struct *dummy) /** * eeh_send_failure_event - Generate a PCI error event - * @dev: pci device + * @edev: EEH device * * This routine can be called within an interrupt context; * the actual event will be delivered in a normal context * (from a workqueue). */ -int eeh_send_failure_event(struct device_node *dn, - struct pci_dev *dev) +int eeh_send_failure_event(struct eeh_dev *edev) { unsigned long flags; struct eeh_event *event; + struct device_node *dn = eeh_dev_to_of_node(edev); const char *location; if (!mem_init_done) { @@ -140,11 +143,10 @@ int eeh_send_failure_event(struct device_node *dn, return 1; } - if (dev) - pci_dev_get(dev); + if (edev->pdev) + pci_dev_get(edev->pdev); - event->dn = dn; - event->dev = dev; + event->edev = edev; /* We may or may not be called in an interrupt context */ spin_lock_irqsave(&eeh_eventlist_lock, flags);